Actuator valve of an air operated double diaphragm pump

An air operated double diaphragm pump 100 comprising:

• an inlet manifold 102 having an inlet port 104, the inlet manifold 102 is configured to receive a fluid via the inlet port 104;
• an outlet manifold 106 having an outlet port 108, the outlet manifold 106 is configured to exhaust the fluid out via the outlet port 108;
• two chambers 112a, 112b;
• a central shaft 124 disposed between the two chambers 112a, 112b, the central shaft 124 is configured to reciprocate between the two chambers 112a, 112b;
• a diaphragm 130a, 130b attached at each end of the central shaft 124, the diaphragm 130a, 130b at each end is configured to divide the respective chamber 112a, 112b into an air chamber 132a, 132b and a fluid chamber 134a, 134b;
• an actuator valve 136, the actuator valve 136 comprising:
• a valve housing 138;
• an inlet 142 for receiving air from an external source;
• a first set of ports 144a, 144b for exchanging the air with each of the air chambers 132a, 132b;
• a second set of ports 146a, 146b for exhausting the air received from each of the air chambers 132a, 132b into the atmosphere;
• a valve piston 148 accommodated within the valve housing 138, the valve piston 148 is configured to reciprocally slide within the valve housing 138;
• and
• an end plate 156a, 156b arranged at each end of the valve housing 138 for limiting the movement of the valve piston 148,
• wherein the valve piston 148 have a bore 152 at one end,
• wherein the end plate 156a have a boss 158 at the corresponding end, and
• wherein the boss 158 of the end plate 156a is arranged to mate with the bore 152 of the valve piston 148.